alias_attribute_with_dirty

# File activerecord/lib/active_record/dirty.rb, line 173
      def alias_attribute_with_dirty(new_name, old_name)
        alias_attribute_without_dirty(new_name, old_name)
        DIRTY_SUFFIXES.each do |suffix|
          module_eval "def \#{new_name}\#{suffix}; self.\#{old_name}\#{suffix}; end\n", __FILE__, __LINE__+1
        end
      end